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问题 I am new to Python. I am trying to make an email script that can send an email. First, I made a Python script without any classes, just function just to make sure that the script runs as expected. After I got the expected result. I am trying to rewrite the script using classes, so as to learn. But I am getting error, which I don't understand. I don't understand where actually the problem lies. Below is the code as well as the screenshot of the error import smtplib import os import sys import

问题 I'm trying to get as close to function pointers / abstract classes as I can in VBA. I have a class called VerificationManager and verifies a bunch of cells in a couple of spreadsheets match up. This will be done in different ways depending on the information and spreadsheets being used with it. I'd like to be able to make the code reusable by specifying a method to be called in a string using the Application.Run function. So I can rewrite the function that changes. Now if I was using Java or

问题 I know in Java, super() in a constructor has to be called as the first line of an overridden constructor. Does this also apply to the parent::__construct() call in PHP? I found myself writing an Exception class like this: class MyException extends Exception { public function __construct($some_data) { $message = ''; $message .= format_data($some_data); $message .= ' was passed but was not expected'; parent::__construct($message); } } and I wondered if this would be considered an error/bad

问题 The following code: class City { var cityId : String? var cityName : String? } class Town { var townid : String? var townName : String? } class Address : City , Town { var house : String? var street: String? } Generates a compile-time error: Address.swift:38:24: Multiple inheritance from classes 'City' and 'Town' How can I solve his kind of problem? What approach to follow? 回答1: It seems you are overthinking things. Instead of inheritance, try to use more composition. An address should not

问题 Hey--I'm trying to design my first game using the Pygame library for Python, and I was wondering what the best practices are for level design in general. I would love to hear what you guys think are good object oriented design patterns for managing levels. Also, I'm fairly new to Python--thanks! 回答1: With this type of game your maps are in terms of tiles (I'm assuming that by level you mean an individual level, not managing all of your levels). Each tile has an associated picture (what it

问题 Hey--I'm trying to design my first game using the Pygame library for Python, and I was wondering what the best practices are for level design in general. I would love to hear what you guys think are good object oriented design patterns for managing levels. Also, I'm fairly new to Python--thanks! 回答1: With this type of game your maps are in terms of tiles (I'm assuming that by level you mean an individual level, not managing all of your levels). Each tile has an associated picture (what it

问题 Hey--I'm trying to design my first game using the Pygame library for Python, and I was wondering what the best practices are for level design in general. I would love to hear what you guys think are good object oriented design patterns for managing levels. Also, I'm fairly new to Python--thanks! 回答1: With this type of game your maps are in terms of tiles (I'm assuming that by level you mean an individual level, not managing all of your levels). Each tile has an associated picture (what it

问题 Hey--I'm trying to design my first game using the Pygame library for Python, and I was wondering what the best practices are for level design in general. I would love to hear what you guys think are good object oriented design patterns for managing levels. Also, I'm fairly new to Python--thanks! 回答1: With this type of game your maps are in terms of tiles (I'm assuming that by level you mean an individual level, not managing all of your levels). Each tile has an associated picture (what it

问题 Just recently discovered about using get and set keywords for class properties I was wondering what is the preferred method when using get / set for typescript classes: class example { private a: any; private b: any; getA(): any{ return this.a; } setA(value: any){ this.a = value; } get b(): any{ return this.b; } set b(value: any){ this.b = value; } } I am just curious if there are any best practices, performance, or other factors. 回答1: Getter and Setters have several uses, like You can make a

问题 Just recently discovered about using get and set keywords for class properties I was wondering what is the preferred method when using get / set for typescript classes: class example { private a: any; private b: any; getA(): any{ return this.a; } setA(value: any){ this.a = value; } get b(): any{ return this.b; } set b(value: any){ this.b = value; } } I am just curious if there are any best practices, performance, or other factors. 回答1: Getter and Setters have several uses, like You can make a